Itchy breasts during development is generally a normal phenomenon, but may also be caused by skin allergies, clothing irritation and other factors. 1. Normal phenomenon: after girls enter puberty, due to the influence of hormones, the appearance of secondary sexual characteristics, breasts begin to develop, may appear breast local skin itching symptoms. 2. Skin allergy: the disease is mainly caused by contact with allergens, such as pollen, animal hair, mites, etc., which may lead to itchy breast skin symptoms, and may also be accompanied by a rash. 3. Clothing irritation: clothes that are too tight and uncomfortable underwear fabrics may cause clothing to rub against the skin of the breasts, resulting in itchy symptoms. In addition, breast hyperplasia and breast fibroadenoma may also occur during the development of breast itching symptoms, once the symptom appears, should consult a doctor in a timely manner, to clarify the cause of the disease and treatment.